I'm having an issue with EF Migrations, specifically with getting the "Enable-Migrations" command to work. When I execute the command in the Package Manager Console I receive the following error:
System.Management.Automation.PSArgumentException: Cannot find type System.Data.Entity.Migrations.MigrationsCommands]: make sure the assembly containing this type is loaded.
at System.Management.Automation.MshCommandRuntime.ThrowTerminatingError(ErrorRecord errorRecord)
Cannot find type [System.Data.Entity.Migrations.MigrationsCommands]: make sure the assembly containing this type is loaded.
It seems to me that the NuGet console can't find the MigrationsCommands type from my EF assembly. I've checked and the assembly is the most recent one (4.3.1), and from within object browser I am unable to find the MigrationsCommands type or namespace.
UPDATE: I still do not have a resolution, but it looks like the source of the issue is in the following output when I run the "Install-Package EntityFramework" command within the Package Manager Console. The error is here:
Unable to find type [ConnectionFactoryConfiguratorInvoker]: make sure that the assembly containing this type is loaded.
At C:\...\packages\EntityFramework.4.3.1\tools\install.ps1:36 char:39
+ [ConnectionFactoryConfiguratorInvoker] <<<< ::Invoke((Join-Path $toolsPath "EntityFramework.PowerShell.dll"), $project)
+ CategoryInfo : InvalidOperation: (ConnectionFactoryConfiguratorInvoker:String) [], RuntimeException
+ FullyQualifiedErrorId : TypeNotFound
After several hours of searching I have found the solution. They key is located Here in Phil Haack's response to "Chris" regarding Reflector 6.5. I had Reflector installed (version 7.0 curiously enough) and the Reflector Add-On enabled within VS2010. Upon researching the NuGet FAQ I uninstalled Reflector and disabled the VS2010 Add-In. This seems to have resolved the issue as I can now both "Install-Package EntityFramework" and "Enable-Migrations" without issue.
Disable the Add-in within VS2010
(Tools-Options-Environment-Add-In/Macros Security/Allow Add-in components to laod)
Disable the ReSharper if installed within VS2010
(Tools-Options-ReSharper-Suspended)
Restart VS2010, the issue will be resolved.
Related
I keep getting the following response when trying to install EF 6.4.4 (or any other!!) NuGet package to a project:
PM> Install-Package EntityFramework -Version 6.4.4
Install-Package : The WriteObject and WriteError methods cannot be called from outside the overrides of the BeginProcessing, ProcessRecord, and EndProcessing
methods, and they can only be called from within the same thread. Validate that the cmdlet makes these calls correctly, or contact Microsoft Customer Support
Services.
At line:1 char:1
+ Install-Package EntityFramework -Version 6.4.4
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Install-Package], PSInvalidOperationException
+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
Any help is highly appreciated.
NuGet: Restoring packages for… An item with the same key has already
been added
Please try these:
Suggestion
1) clean all nuget caches or delete any nuget caches under C:\Users\xxx(current user name)\.nuget\packages
2) make sure that you can access the Internet and turn off any firewall or any antivirus software
Also, you can try to check if you can access the package under Manage Nuget packages by right-click on your project
3) close VS, delete .vs hidden folder under Solution folder, bin and obj folder, then delete nuget.config file under C:\Users\xxx(current user name)\AppData\Roaming\NuGet and then restart your project to test again.
Also, please enable nuget.org package source and disable the others under Tools-->Options-->Nuget Package Manager--> Package Sources
Enable nuget.org and disable others.
Run update-package -reinstall under Package Manager Console
Last, choose the nuget.org as package source and the right target project and then install EntityFramework to test again.
In addition, please try to create a new project and then install that package in it to check if the issue occurs only on your current project.
I have several class files. Now I am adding a new model class and tried to type add-migration InitialCreate but am getting the following error:
PM> add-migration InitialCreate
Exception calling "LoadFrom" with "1" argument(s): "Could not load file or assembly 'file:///C:\Users\user\Documents\Visual Studio 2013\Pro
jects\DigitalHealthWebPrev\packages\EntityFramework.6.1.3\tools\EntityFramework.PowerShell.Utility.dll' or one of its dependencies. Operati
on is not supported. (Exception from HRESULT: 0x80131515)"
At C:\Users\user\Documents\Visual Studio 2013\Projects\DigitalHealthWebPrev\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:780 c
har:62
+ $utilityAssembly = [System.Reflection.Assembly]::LoadFrom <<<< ((Join-Path $ToolsPath EntityFramework.PowerShell.Utility.dll))
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
You cannot call a method on a null-valued expression.
At C:\Users\user\Documents\Visual Studio 2013\Projects\DigitalHealthWebPrev\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:781 c
har:50
+ $dispatcher = $utilityAssembly.CreateInstance <<<< (
+ CategoryInfo : InvalidOperation: (CreateInstance:String) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull
Exception calling "CreateInstanceFrom" with "8" argument(s): "Could not load file or assembly 'file:///C:\Users\user\Documents\Visual Studi
o 2013\Projects\DigitalHealthWebPrev\packages\EntityFramework.6.1.3\tools\EntityFramework.PowerShell.dll' or one of its dependencies. Opera
tion is not supported. (Exception from HRESULT: 0x80131515)"
At C:\Users\user\Documents\Visual Studio 2013\Projects\DigitalHealthWebPrev\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:809 c
har:31
+ $domain.CreateInstanceFrom <<<< (
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
PM>
Using the Package Manager, you need to re-install Entity Framework:
Uninstall-Package EntityFramework -Force
Then install it for each project:
Install-Package EntityFramework
Then do not forget to restart the studio.
https://stackoverflow.com/a/14994432/1845408
Used the command EntityFramework6\add-migration {migration name} instead. Microsoft changed the name of the command.
Just restart the visual studio and clean the solution and rebuild it again.
Make sure that VS in admin mode
In my case, it was a different entity-framework version between main project and the project containing DbContext.
I just updated version of package in both projects to v6.4.4
I had a slightly different case today, I'm wirting the details here in case that might help somebody. The error was referencing one of my assemblies instead, on which the assembly containing the EF DbContext was depending.
I solved it setting the referenced assembly to "Copy Local" "true" so it'd make a local copy when building for migrations and therefore be able to find it.
you need to re-install Entity Framework:
I went to "Manage Nuget Packages for Solution..." and updated all my packages. This worked for me.
Then I got another error Cannot bind argument to parameter 'Path' because it is null.
Setting another project as startup project other then my web app, before running any EF command in Package Manager Console, worked for me.
Whats missing are the dlls from (Solution Folder)/packages/EntityFramework.6.1.3/tools/.
Things I would try:
Nuget will keep a copy of the .nupkg you might find the missing files there ((Solution Folder)/packages/EntityFramework.X.Y.Z/) (Open the nupkg as zip)
If not you may have luck redownloading the package manually here https://www.nuget.org/packages/EntityFramework (Make sure you download the right packages. In your case it would be 6.1.3)
If that doesnt work you can retry one of the above solutions of completely removing and reinstalling EF but make sure you install the same version for each project.
Also there seem to be versions that dont include those files. For example as of writing this answer 6.3.0 actually doesnt include the dlls needed while 6.1.3 does. I also had success copying the dlls from an older version like 6.1.3 into the newer like 6.3.1 (Might give a warning but generally works as expected).
In my ASP.NET MVC 5 I need to use Entity Framework. I have tried installing latest Entity framework through Nuget package, but I am getting the following error below. I have pasted the complete nuget stack error. I have tried several things like un-installing/installing EF, adding EF references manually,etc. but none have worked so far and I have lost 2 days.
I have tried links similar to my problem here in this site and even that has not helped and hence starting new thread hoping that someone will help me here!
Need help here...I am stuck.
Error stack:
Install-Package EntityFramework
Installing 'EntityFramework 6.1.0'.
You are downloading EntityFramework from Microsoft, the license agreement to which is available at http://go.microsoft.com/fwlink/?LinkID=320539. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed 'EntityFramework 6.1.0'.
Adding 'EntityFramework 6.1.0' to EPP.
Successfully added 'EntityFramework 6.1.0' to EPP.
System.InvalidOperationException: This operation would create an incorrectly structured document.
at System.Xml.Linq.XDocument.ValidateDocument(XNode previous, XmlNodeType allowBefore, XmlNodeType allowAfter)
at System.Xml.Linq.XDocument.ValidateNode(XNode node, XNode previous)
at System.Xml.Linq.XContainer.AddNodeSkipNotify(XNode n)
at System.Xml.Linq.XContainer.AddContentSkipNotify(Object content)
at System.Xml.Linq.XContainer.Add(Object content)
at System.Data.Entity.Migrations.Extensions.XContainerExtensions.GetOrCreateElement(XContainer container, String elementName, XAttribute[] attributes)
at System.Data.Entity.ConnectionFactoryConfig.ConfigFileManipulator.AddOrUpdateConfigSection(XDocument config, Version entityFrameworkVersion)
at System.Data.Entity.ConnectionFactoryConfig.InitializeEntityFrameworkCommand.<>c__DisplayClass3.<Execute>b__1(XDocument c)
at System.Data.Entity.ConnectionFactoryConfig.ConfigFileProcessor.ProcessConfigFile(ProjectItem configItem, IEnumerable`1 manipulators)
at System.Data.Entity.ConnectionFactoryConfig.InitializeEntityFrameworkCommand.<>c__DisplayClass3.<Execute>b__0(ProjectItem i)
at System.Data.Entity.ConnectionFactoryConfig.ConfigFileFinder.FindConfigFiles(ProjectItems items, Action`1 action)
at System.Data.Entity.ConnectionFactoryConfig.InitializeEntityFrameworkCommand.Execute()
at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
Uninstalling 'EntityFramework 6.1.0'.
Successfully uninstalled 'EntityFramework 6.1.0'.
Install failed. Rolling back...`enter code here`
Install-Package : This operation would create an incorrectly structured document.
At line:1 char:16
+ Install-Package <<<< EntityFramework
+ CategoryInfo : NotSpecified: (:) [Install-Package], RuntimeException
When Entity Framework is upgraded, the app.config or web.config files will get stuff written into them. Check your web.config file. From here the error was
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
which was fixed when the line was changed to
<configuration>
I can't seem to get Entity Framework 6.0.1 to install on a couple of F# projects I have. This is the error message I'm getting:
Executing script file 'C:\source\payboard\PayboardWeb\packages\EntityFramework.6.0.1\tools\install.ps1'.
Exception calling "SetData" with "2" argument(s): "Type 'Microsoft.VisualStudio.FSharp.ProjectSystem.Automation.OAProject' in assembly 'FSharp.ProjectSystem.Base, Version=12.0.0.0, Culture=neutral,
PublicKeyToken=b03f5f7f11d50a3a' is not marked as serializable."
At C:\source\payboard\PayboardWeb\packages\EntityFramework.6.0.1\tools\EntityFramework.psm1:633 char:5
+ $domain.SetData('project', $Project)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : SerializationException
System.NullReferenceException: Object reference not set to an instance of an object.
at System.Data.Entity.ConnectionFactoryConfig.InitializeEntityFrameworkCommand.Execute()
at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
It seems like there's an open bug for it on the EF6 forums (https://entityframework.codeplex.com/workitem/891), but it hasn't gotten any love, so far as I can tell.
EF6 installs just fine on non-F# projects.
Any suggested workarounds?
This is getting unblocked in EF6.1. Here is the workitem.
Note that the issue here is not EF itself but how the package is being added to your project. This makes me think that until EF6.1 is released you could probably work around this issue by getting the package unzipping it and adding references to EF6 assemblies manually to your project. Then you would have to update your config accordingly. (You could also create a temp C# project add the EF6 NuGet package which will give you the EntityFramework and EntityFramework.SqlServer dlls you could copy to your F# project and also a config file you could copy from which will be much easier than coming with the right configuration on your own)
I am using ContosoUniversity example. I have just used Nuget to download and install code first migrations pakage. Whe I excecute update-database command it throws an error . Is there anything to do more than installing nuget package?
Update-Database : Could not load type 'System.Data.Entity.Infrastructure.DbContextInfo' from assembly 'EntityFramework, Version=4.1.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
At line:1 char:16
+ update-database <<<<
+ CategoryInfo : NotSpecified: (:) [Update-Database], TypeLoadException
+ FullyQualifiedErrorId : System.TypeLoadException,System.Data.Entity.Migrations.Commands.MigrateCommand
Edit ,
Now I have installed ADO.NET Entity Framework 4.1 - Update 1 and now it throws an error
Update-Database : The project 'ContosoUniversity' does not contain or reference any contexts.
At line:1 char:16
+ update-database <<<<
+ CategoryInfo : NotSpecified: (:) [Update-Database], InvalidOperationException
+ FullyQualifiedErrorId : System.InvalidOperationException,System.Data.Entity.Migrations.Commands.MigrateCommand
I have tried the scenario in microsoft blog but nothing changed. ( http://blogs.msdn.com/b/adonet/archive/2011/07/27/code-first-migrations-august-2011-ctp-released.aspx )
Try installing the msi.
http://www.microsoft.com/download/en/details.aspx?id=26825
The second error that you are getting sounds like it s having problems identifying a context within your project. Make sure that you have a class that inherits from DbContext.
I would also check that your project is referencing the correct version of the Entity Framework - 4.1 Update 1. Depending on the project type, you should be able to locate the reference in question within the References folder within your project. You may need to click on the 'Show All Files' button (second from the left in the toolbar at the top of the Solution Explorer).
Once you have the reference selected, you will see information such as the path of the DLL and its version in the Properties pane (F4 if it is not already visible).
Edit: According to JTew below, a restart of Visual Studio is required.
Had the same error.
I had:
Installed EF 4.1 (the older version) via an .msi
Installed the newer version (EF 4.1 Update 1 Migrations Alpha 3) via NuGet
This error turned out to be the framework complaining because it was getting the older 4.1.0.0 from the GAC.
Uninstalling the older EF 4.1 did the trick.